Hi Tam!
Happy Mother's Day! Are you a mom?
Here's a link with the info you asked:
http://www.medhelp.org/posts/Fibromyalgia/IWillDoThis-To-help-Alleviate-Fibro-Symptoms/show/1677486
You can purchase it from health food stores or from online vendors.
making your own Mg Oil from flakes is much cheaper.
Do daily applications at first, if seriously deficient.
And yes, Magnesium chloride is water soluble.
Oral intake is inefficient and it may have laxative effects.
For D3, do liquid emulsified sublingual for best delivery.
Iron is a tough one. Liver and red meat , if not a vegetarian- opt for pastured if possible-is your best bet. Supplementation is problematic for most.
I deal with fibro sufferers - alternative and complimentary therapies and
hypnotherapy for fibro. Many are unfortunately misdiagnosed.
FMS is often used in medicine as a catch-all dx, when the symptoms match.
If you need more details, post again or pm me.
Cheers!
Niko